KVM: X86: Use IPI shorthands in kvm guest when support

IPI shorthand is supported now by linux apic/x2apic driver, switch to
IPI shorthand for all excluding self and all including self destination
shorthand in kvm guest, to avoid splitting the target mask into several
PV IPI hypercalls. This patch removes the kvm_send_ipi_all() and
kvm_send_ipi_allbutself() since the callers in APIC codes have already
taken care of apic_use_ipi_shorthand and fallback to ->send_IPI_mask
and ->send_IPI_mask_allbutself if it is false.

Cc: Thomas Gleixner <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Radim Krčmář <[email protected]>
Cc: Sean Christopherson <[email protected]>
Cc: Nadav Amit <[email protected]>
Signed-off-by: Wanpeng Li <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 4ab377c9fffede8af8c93b620bdb9d90803fd353..31b68db02e8d0c6a7e7a8edcb50ea09853b10ddb 100644 (file)
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -502,16 +502,6 @@ static void kvm_send_ipi_mask_allbutself(const struct cpumask *mask, int vector)
        __send_ipi_mask(local_mask, vector);
 }
 
-static void kvm_send_ipi_allbutself(int vector)
-{
-       kvm_send_ipi_mask_allbutself(cpu_online_mask, vector);
-}
-
-static void kvm_send_ipi_all(int vector)
-{
-       __send_ipi_mask(cpu_online_mask, vector);
-}
-
 /*
  * Set the IPI entry points
  */
@@ -519,8 +509,6 @@ static void kvm_setup_pv_ipi(void)
 {
        apic->send_IPI_mask = kvm_send_ipi_mask;
        apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
-       apic->send_IPI_allbutself = kvm_send_ipi_allbutself;
-       apic->send_IPI_all = kvm_send_ipi_all;
        pr_info("KVM setup pv IPIs\n");
 }